Andbew teas



Patented Dec.14,1sso

A. TEAS. Machine for Cutting Leather, Paste Board, 8vo.

. PETERS. PHoro-LATHOGHAPHEH. WASHINGTON. D CA lil-- ..-lil :1.1::

(No Medel.)

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UNirnn States ANDREW TEAS, OF NEWARK, NEW JERSEY.

MACHINE FOR CUTTING LEATHER, PASTEBOARD, 80C.

SPECIFICATION forming part of Letters Patent No. 235,588, dated December 14, 1880, Application filed April 4, 1880. (No model.)

` Jersey, have invented certain new and useful Improvements inlVIachinesfor Gattin gLeather, Pasteboard, and other Like Materials, of which the following is a specification.-

. My improvements relate to machines for cut-` ting leather and other materials, wherein a` knife or knives is orare actuated to cut the` material in curved or other outline, by means of a pattern or pattern-bar, past which said knife or knives travel. applicable to a machine for cutting, skiving, creasiug,and polishing leather straps,for which were granted to m e Letters Paten t of the United States, numbered 217,428, and dated July 8,1 y 1879, and will be described here in relation to parts of such a machine.

In machines heretofore made wherein a stationary patternbar has been employed to direct the knife or knives, the knife or knives not being susceptible of an oscillating motion relatively to the sides of the pattern to present their edges at all times in the direction of the cut, have effected cuts at an angle to the pattern with a more or less dragging or tearing action, which has proved very objectionable, especially With certain materials, and notably with pasteboard.

The object of these improvements is to obviate this objection; and to this end they consist in the combination of a stationarypattern and a knife or knives adapted to be "inoved along said pattern and directed bythe same in cutting, and susceptible of oscillating or adjusting themselves so as to present their edges iu the direction of the cut at all times.

They also consists in the combination of a station ary pattern and a disk-shaped rotary knife or knives directed by the same in cutting, and susceptible of oscillating or adjustingl themselves so as to present their edges in the direction of the cut at all times.

They also consist in the Vcombination of a pattern, a knife or knives directed by the same in cutting, and weights or springs for keeping them or their supports in contact with the pattern.

In the accompanying drawings, Figure I is a plan of a machine embodying my improve- They are particularlyV ments. Fig. 2 is a transverse section ot' the same. Fig. 3 is a perspective view of one of the knife-slides and knives, illustrative of a different method of securing a knife to its slide. Fig. 4 is a side view of one of tlleknif'estocks and a disk-shaped rotary knife secured thereto, and Fig. 5 is a side view of one of the knife-stocks and knives shown in the machine illustrated in Figs. l and 2. y

Similar letters ot' reference designate corresponding parts in all the figures. A designates the bed or framework ofthe machine.

B designates a carriage, consisting in this example ot' myinvention of arectangular frame arranged to travel along shears or ways a, ex-

tending from the bed or frame-work A, motion being imparted to it by any suitable meanssuch, for instance, as a rack or racks, b, and

a pinion or pinions, c, engaging therewith and actuated by acrank, d, on the shaft c, which carries said pinion or pinions.

G designates a pattern, consisting, as here shown, of a stationary bar having a wavy or curved outline at the edges, and attached to the carriage B, to m-ove therewith. It is preferably detachably secured, by screws f, or otherwise, to the carriage B, so that it maybe removed and replaced by another, when desirable.

D designates knives (here shown as two in number) whereby the cutting is performed. They are mounted in slides S, ittin g on a transverse bar, E, and impelled toward the pattern by weights F, attached to them by cords passing over pulleys G. In some cases I may employ springs in lieu of these Weights and their appurtenances.

rIhe knives shown in Figs. l and 2 are provided with round pivot-like Shanks g, which tit in cavities or bearings of corresponding shape in the slides S, in such manner .as to be free to oscillate or turn part Way round therein.

The Shanks g may be formed in one piece with the knives,or may be formed in one piece with stocks D', provided y with recesses, in which the knives are tted and secured by sere-Ws h. The latter construction is preferable, as itfa-cilitates the temperingof the knives.

When the slides S are impelled toward the pattern, as above explained, the knives bear aga-inst the edges of thepattern, and, owing IOO to tlleir pivotal connection with the slides S, adjust themselves at different allgles as the wavy or curved side of the pattcrll moves past them, and thus presellt their edges in the direction of the cut. This prevents any tearing or dragging action on the material being cut.

The knife D2 shown ill Fig. 3 has a shank, H, extending at right all gles to it, and secured in a recess in a stock, D3, by a screw, z', serving also to secure this stock to the slide S in such nlanner that it may oscillate or turn to enable the knife to properly adjust itself to the pattern.

The knife D4 shown in Fig. 4 consists of a disk provided with sharp edges, and con nected, by a screw, 7c, to a stock, D5, having a pivotal connection with a slide. This knife is conllected to the stock, so as to be free to rotate on coming ill contact with the material to be cut, and is especially applicable to the cuttillg of pasteboard and similar materials. Preferably it its a hub or nipple on the stock, so as not to cause undue strain on the screw.

Any suitable devices for throwing the weights out of action when it is not desired to hold the knives in contact with the pattern may elllployed.

ln many cases one knife only lnay be used.

By my invention I provide a machine whereby leather, pasteboard, clotll, and other like materials lnay be effectively cut by unskilled persons without danger of heilig' torll.

What I claim as lnyinventioll, and desire to secure by Letters Patent, is

1. The combinatioll, in a machine for cutting leather, pasteboard, and other materials, of a stationary pattern and a knife or knives adapted to be moved along said pattern and directed by the sanle ill cutting, and suscepti ble of oscillating or adjusting themselves so as to presellt tlleir edges ill the direction of the cut at all times, substantially as specified.

2. The colnbination, in a machine for cutting leather, pasteboard, alld other lnaterials, of a stationary pattern and a knife or knives adapted to be moved along said pattern, and susceptible of lnotion toward alld from the pattern and of adjusting themselves at different angles relatively to the pattern.

3. The colnbination, in a machine for cutting leather, pasteboard, and other materials, of a stationary pattern and a disk-shaped rotary knife or knives directed by the same ill cutting, and susceptible of oscillating or adjusting themselves so as to present their edges in the direction of the cut, substantially as specified. l

4. The combination, in a machine for cnt.- tin g leather, pasteboard, and other materials, of a stationary pattern and a knife or knives directed by the same, and weights or springs orkeepingthe knives or their supports ill contact with the patterns, substantially as specilied.

ANDREW TEAS.

Witnesses T. .1.KEANE, E. P. J Essor. 

